9° 



BOTANY. 



half of the leaf), the leaf suddenly closes and captures it. It 

 has been found that when the hair is touched the first time no 

 movement of the leaf takes place, but when it is touched the 

 second time the leaves close up suddenly. There are small 

 glands on the surface of the leaf which excrete a substance that 

 digests the insect, when the digested portions are absorbed by 

 the leaf and are assimilated bv the plant as food. The leaf of 

 the sundew is quite different in form and action. In the species 



Fig. 66. 

 Dodder. 



illustrated here the lamina of the leaf is rotund, and the upper 

 surface is covered with numerous long glandular hairs. The 

 gland is on the end of the hair, and a sticky substance is 



